FR1035957A - Viseur à champ variable - Google Patents

Viseur à champ variable

Info

Publication number
FR1035957A
FR1035957A FR1035957DA FR1035957A FR 1035957 A FR1035957 A FR 1035957A FR 1035957D A FR1035957D A FR 1035957DA FR 1035957 A FR1035957 A FR 1035957A
Authority
FR
France
Prior art keywords
variable field
viewfinder
field viewfinder
variable
field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Inventor
Stephane Boisse
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR1035957A publication Critical patent/FR1035957A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR1035957D 1951-04-20 1951-04-20 Viseur à champ variable Expired FR1035957A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1035957T 1951-04-20

Publications (1)

Publication Number Publication Date
FR1035957A true FR1035957A (fr) 1953-09-02

Family

ID=9586069

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1035957D Expired FR1035957A (fr) 1951-04-20 1951-04-20 Viseur à champ variable

Country Status (1)

Country Link
FR (1) FR1035957A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859654A (en) * 1953-12-02 1958-11-11 Frank G Back Varifocal viewfinders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859654A (en) * 1953-12-02 1958-11-11 Frank G Back Varifocal viewfinders

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